Ventilator



` Jan. 11,1927. l 1,613,666

C. H. LIGHTHART VBNTILATOR Filed March 4. l1926 Patented dan. 11, 1927.`

f entre .sarai-ass tartar enemies meinerseits, orma noir, new Yoninassieiion fro LIDOEN ivirs. cortisonef Tron, on BATAVIA, iin-w Yoan, A CORPORATION 0F NEW YonK.

vENTiL'A'Ton.

Application filed March 4, ieee. serial no. 92,175.

My invention relates to a ventilator, more particularly of the rotary type, adapted to be operated by wind currents for withdrawing gases and foul air from the vent pipe of a building.

A principal object of the invention is to afford a simplified and practical construction that can be manufactured on a commercial. scale and affords an arrangement that insures efficiei'it operation.

In a more specific aspect, the invention has for its purpose to provide a compact construction in which the rotating parts are so mounted as to reduce friction to' a minimum, and thus effect operation of thedevice with slight wind currents.

Another object of the' invention is to minimize the pressure or resistance created by the air as it is drawn from a vent pipe, and in other ways to secure a free movement of the suction means so thatlittle power is required to operate the propeller and keep the ventilator in action.

Still an additional purpose of the invention is to so mount and arrange the rotary parts as to insure steady, uniform motion of the suction means at all times, so far as possible.

Vith these and other ends in view, the invention comprises the structure that will appear clearly from the following description, when read in conjunction with the accompanying drawing, the novel features being pointed out in the claims following the description.

In the drawing:

Figure 1 is a plan view of a ventilator in'- corporating a preferred embodiment of the invention Figure 2 is a side elevation of the same;

Figure 3 is a vertical central sectional View;

Figure 4L is a detail plan view, partially broken away, of the suction means, and

Figure 5 is a detail sectional view on line 5-5 of Figure 1.

Referring more particularly to the drawings, in which like reference numerals refer to corresponding parts in the several views, 1 designates a tubular fitting adapted to be connected with a vent pipe or other outlet, and 2 designates a storm band mounted upon the tubular fitting 1 by means of supporting members 3 which are, bolted or otherwise secured to the parts 1 and 2 as shown. Said supporting members 3 also include upwardly and Ainwardly extending portions which are fixedly connected to, and maintain in place, a do'me 4f. The storm band 2 also includes an upwardly and inwardly deliecting port-ion 5 spaced from the dome 4 andv affording a plassage 18 through which the air can escape upwardly.

li/iounted at the topof the dome 4 is a suitable fitting 6 containing a thrust bearing 7 that supports a wind propeller` 8, the latterA being mounted on the shaft 9. The propeller-shaft 9 also carries the suction means for draifving air from the vent, and which in the present instance includes a narrow circular band 10 Vconnected to the propeller shaft 9 by lateral bracing members 11 and 12,one of which is horizontal and the other of which is connected to shaft 9 at a point somewhat above the suction blades in order to lend greater stability to the structure.

The suction blades are designated at 13, these being suitably attached to the band 10` and extending an equal distance above and below the'band so as to afford a light weight and balanced construction. Preferably each of the suction blad-es includes a body portion formed' substantiallyas shown in Figure fl,"

and a reducedv attaching portion o`r` lug 14: of the same width the band 10 to which it is secured. 15 designates a` radial bearing supportedby a horizontal rod 16 and acting to center the lower end of the shaft 9 and permit free, easy rotation of the suction" means and propeller blades, this entire unit beingsupported at thetop of the dome 4L and thus' `reducing friction and insuring uniform steady movement of the rotating parts when butv little wind current is available.

The storm band unit with its deflecting portion 5 may be made in any suitable way and preferably includes a series of flat sec tions connected together by seams or joints such as illustrated in Figure 5, and together forming an octagonal body that surrounds the suction blades, the upper partof the dctlecting portion 5 extending to a point slightly beneath the propeller blades 8.

ln the operation of the device, wind currents cause rotation of the propeller blades 8 and shaft 9, thus turning the suction means or blades 13 which act to draw the air and gases up through the tubular fitting 1 whence it passes laterally, a portion of such air going downwardly and outwardly through the opening or passage 17 and the remainder exhausting upwardly through' the passage 18 between the outer surface of the dome 4 and the defiecting port-ion 5. In t-his way, ready egress of the air is permitted and. there is no chance of a pressure forming within the chamber or dome 4 to retard the action of the suction means, while the dome #l serves to prevent access of rain or moisture through the tubular fitting 1 to the vent pipe.

While I have disclosed the invention with reference to a detailed embodiment, it is not limited to the particular construction herein shown, but may be modified without departing from the essential features of the invention as set forth in the following claims.

I claim:

1. rI`he combination with a fitting adapted to be connected to a vent pipe, of a storm band supported by said fitting, a don'c supported by the storm band and spaced inwardly therefrom, a propeller and propeller shaft, a thrust bearing on the dome supporting the propeller shaft, and suction means arranged within the storm band above said fitting and mounted on the propeller shaft.

2. The combination with a fitting adapted to be connected to a vent pipe, of a storm band supported by said tting, a dome supported by the storm band, an inwardly eX- tending defiecting portion on the storm band surrounding the dome and spaced therefrom, a propeller, a propeller shaft extending downwardly through the dome, a thrust bearing on the dome supporting the pr0- peller shaft, and suction means located within the storm band above said fitting and mounted on said propeller shaft.

The combination with a fitting adapted to be connected to a vent pipe, of a storm band supported by said fitting and having an upper inwardly extending deflecting portion, a dome arranged within the storm band and spaced from said defiecting portion, a propeller, a thrust bearing at the top of the dome on which the propeller is mounted, a propeller shaft, a radial boaring at the bottom of the propeller shaft, and suction means mounted on the propeller shaft and located within the storm band above said fitting.

4. The combination with a fit-ting adapted to be connected to a vent pipe, of a storm band supported by said fitting and having an upper inwardly extending deflecting portion, a dome arranged within the storm band and spaced from said deflecting portion, a propeller, a thrust bearing at the top of the dome on which the propeller is mounted, a propeller shaft, a radial bearing at the bottom of the propeller shaft, suction means mounted on the propeller shaft and located within the storm band above said fitting, the suction means including an annular band extending laterally beyond said fitting and said dome, lateral brace niembcrs connecting` said band to the propeller shaft, and a series of suction blades mounted on said band.

5. The combination with a fitting adapted to be connected to a vent pipe, of a storm band supported by said fitting and having an upper' inwardly extending deflecting portion, a dome arranged within the storm band and spaced from the deecting portion, a propeller, a thrust bearing at the top of the dome on which the propeller is mounted, a propeller shaft, a radial bearing at the bottom of the propeller shaft, suction means mounted on the propeller shaft and located within the storm band above said fitting, the suction means including a narrow annular band extending laterally beyond said fitting and said dome, lateral brace inembers connecting said band with the propeller shaft, and a series of suction blades each of which includes a body portion extending a like distance above and below the band and a reduced portion or lug connected to the band.

In witness whereof, I have hereunto signed my name.

CHARLES II LIGI-ITHART. 

